The days of the week were named by the Romans with the Latin words for the Sun, the Moon, and the five known planets.

Sunday is the first day of the week among Christians. It is the day set aside for rest and for worship of God. Sunday was the day sacred to the sun among the TEUTONIC people and it means ‘the day of the sun’

Monday is the second day of the week. The word comes from the ANGLO-SAXON NONANDAEG which means the moon’s day. In ancient times, each of the seven days of the week was dedicated to a god or goddess. And Monday was sacred to the goddess of the moon.

Tuesday is the name of the third day of the week. Its name comes from TIU or TIW, the old ANGLO-SAXON form of TYR, name of the Norse god of war. Tyr was the son of odin or woden, after whom Wednesday was named.

Wednesday is the English name for the fourth day of the week. This day gets its name from woden, or odin, the chief god in teutonic mythology, to whom it was sacred. At the beginning of the Christian era, the germans called the day woden’s day.

Thursday is the fifth day of the week. The ancient Norsemen considered the day sacred to thor, the teutonic god of thunder. The name means thor’s day.

Friday is the sixth day of the week. This name comes from the anglo-saxon word frigedaeg, which means frigg’s day. Frigg was a goddess of love in norse mythology.

Saturday called saeter-daeg by the anglo-saxons, is the seventh day of the week. It is named after the roman god Saturn and is the only day named after a roman god.
http://www.tycrib.com/2017/04/the-origin-of-days-of-week.html

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